A marketing order may contain provisions which regulate the period during which any commodity, or any grade, size, or quality of such commodity, may be processed, distributed, or otherwise marketed within this state by any and all persons that are engaged in such processing, distributing, or marketing within this state. The total quantity of such commodity which is so regulated and permitted to be processed, distributed, or otherwise marketed during such period, shall not, however, be less than the quantity which the director finds is necessary to reasonably supply the needs of consumers of such commodity.